Английская Википедия:Dicobalt hexacarbonyl acetylene complex
Dicobalt hexacarbonyl acetylene complexes are a family of In organocobalt compounds with the formula Шаблон:Chem2. A large variety of R groups are tolerated. They are red compounds that are soluble in organic solvents. They arise from the reaction of alkynes and dicobalt octacarbonyl:[1]
According to X-ray crystallography, the two Co atoms and two alkyne carbons form the vertices of a distorted tetrahedron. The C-C distance for the bridging alkyne ligand is 1.33 Å, and the Co-Co distance is 2.47 Å. The Шаблон:Chem2 core has C2v symmetry.[2] The structure is related to that of methylidynetricobaltnonacarbonyl and tetracobalt dodecacarbonyl, which are also tetrahedranes.
These complexes are intermediates in the Pauson-Khand reaction.
References
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